Music (Voice) by voice chip into a differential output analog voltage signal, through a differential subtraction circuit into a single-ended signal, AD converter chip analog signal into a digital signal. Single-chip digital filter design using speech signal processing, three-way PWM output signal based on the results of low-pass, band-pass and high-pass filters of the three. Three PWM signals are controlled by the driver circuit LED light with red, green and blue color brightness and light color shade with the music changes.

DigitalFilter
.............\DigitalFilter.C
.............\DigitalFilter.cof
.............\DigitalFilter.hex
.............\DigitalFilter.hxl
.............\DigitalFilter.lst
.............\DigitalFilter.map
.............\DigitalFilter.mcp
.............\DigitalFilter.mcs
.............\DigitalFilter.mcw
.............\DigitalFilter.obj
.............\DigitalFilter.p1
.............\DigitalFilter.rlf
.............\DigitalFilter.sdb
.............\DigitalFilter.sym
.............\code
.............\....\DigitalFilter_0111.C
.............\....\DigitalFilter_0119.C
.............\复件 DigitalFilter.C

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